Hypertension is excessive levels of internal arterial pressure caused by resonance within the aorta and larger arteries. It has nothing whatever to do with quot;driving pressuresquot; caused by hardening of the arteries. High, (but purely circulatory, not driving ) pressures and flows are induced, called damped oscillations because the pulse rate approaches the natural frequency of the large elastic plenum comprising the aorta and larger arteries. These have nothing to do with driving the blood round the arterial loop, and are quot;work-lessquot; because no energy is expended or gained by the pulse pressure wave (apart from losses, that is). Think of it in terms of a car bouncing up and down on a washboard road... at certain speeds it will just go up and down more and more, getting worse and worse,- shaking the hell out of itself and you (and can become dangerous) -But the forward speed is unaffected. - But of course, they CAN be excessive, and become dangerous if and when high stress-loads (either physical or mental) cause high cardiac output. These magnify the oscillatory pressures enormously, and peak transient pressures then cause rupture of blood vessels. Near the heart, they would be coronary; then in the torso could cause aortic aneurisms, but even in such vessels as the arterioles and capillaries, ( -in the brain for instance), they would be stroke. You can safely ignore any answers from doctors, cardiologist, nursing or medical students, First-aiders, Paramedics or boy-scouts.. They are totally wrong.
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High blood pressure (HBP) or hypertension means high pressure (tension) in the arteries. Arteries are vessels that carry blood from the pumping heart to all the tissues and organs of the body. Emotional tension and stress can temporarily increase blood pressure. Normal blood pressure is below 120/80; blood pressure between 120/80 and 139/89 is called quot;pre-hypertensionquot;, and a blood pressure of 140/90 or above is considered high.
High Blood Pressure. Arteries are vessels that carry blood from the pumping heart to all the tissues and organs of the body.
High blood pressure
High Blood Pressure
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